EP2182737A1 - Elektronische Vorrichtung mit elektroakustischem Elektretwandler - Google Patents

Elektronische Vorrichtung mit elektroakustischem Elektretwandler Download PDF

Info

Publication number
EP2182737A1
EP2182737A1 EP09169282A EP09169282A EP2182737A1 EP 2182737 A1 EP2182737 A1 EP 2182737A1 EP 09169282 A EP09169282 A EP 09169282A EP 09169282 A EP09169282 A EP 09169282A EP 2182737 A1 EP2182737 A1 EP 2182737A1
Authority
EP
European Patent Office
Prior art keywords
conductive plate
electronic device
housing
electrode layer
electret diaphragm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09169282A
Other languages
English (en)
French (fr)
Other versions
EP2182737B1 (de
Inventor
Fang Ching Lee
Yi Tsung Cheng
Chih Chao Hsieh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HTC Corp
Original Assignee
HTC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HTC Corp filed Critical HTC Corp
Priority to EP11162045.6A priority Critical patent/EP2369855B1/de
Publication of EP2182737A1 publication Critical patent/EP2182737A1/de
Application granted granted Critical
Publication of EP2182737B1 publication Critical patent/EP2182737B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/013—Electrostatic transducers characterised by the use of electrets for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the invention relates to an electronic device with an electro-acoustic transducer, and more particularly, to an electronic device with an electret electro-acoustic transducer.
  • Loudspeakers are a kind of device to make sound.
  • the principle of making sound for the loudspeakers is to move the diaphragms thereof by electrical signals to push the air.
  • the loudspeakers have been broadly used in electronic devices with the function of making sound, such as mobile phones, personal digital assistants (PDAs) and laptop computers.
  • One of the common loudspeakers is so-called dynamic loudspeaker.
  • the principle of making sound for the dynamic loudspeaker is to drive a current through the voice coil to produce a magnet field. This magnetic field causes the voice coil to react to the magnetic field from a permanent magnet fixed to the frame of the loudspeaker thereby moving the diaphragm attached with the voice coil.
  • the loudspeaker has a considerable thickness because its sound chamber is large.
  • An electronic device with an electret electro-acoustic transducer according to the present invention is provided.
  • the electret electro-acoustic transducers of the electronic devices have a greatly smaller thickness than the traditional dynamic loudspeakers. Therefore, the available space inside the electronic device can be increased.
  • the electronic device with an electro-acoustic transducer of the present invention includes a housing having a plurality of openings penetrating between the inner surface and the outer surface thereof.
  • An electro-acoustic transducer is disposed on the inner surface of the housing.
  • the electro-acoustic transducer includes a first electret diaphragm positioned on the inner surface of the housing.
  • the first electret diaphragm includes a first film body and a first electrode layer formed on the lower surface of the first film body.
  • the first film body is made of dielectric material and has static charges.
  • a first conductive plate as an electrode is stacked on the upper surface of the first film body and has a plurality of openings.
  • at least one first spacer is disposed between the first electret diaphragm and the first conductive plate to keep a predetermined distance therebetween.
  • the electronic device with an electro-acoustic transducer further includes a second conductive plate functioning as an electrode as compared with the electronic device of the first embodiment.
  • the second conductive plate is stacked on the first conductive plate and has a plurality of openings.
  • An isolation layer made of porous air-permeable membrane is disposed between first and second conductive plates.
  • a second electret diaphragm is positioned on the second conductive plate and includes a second film body and a second electrode layer formed on the upper surface of the second film body.
  • the second film body is made of dielectric material and has static charges.
  • a sound absorbing layer is attached to the second electrode layer.
  • at least one second spacer is disposed between the second electret diaphragm and second conductive plate to keep a predetermined distance therebetween.
  • the electronic device with an electro-acoustic transducer of the present invention includes a housing having a plurality of openings penetrating between the inner surface and the outer surface thereof.
  • An electro-acoustic transducer is disposed on the inner surface of the housing.
  • the electro-acoustic transducer includes a conductive plate as an electrode that is disposed on the inner surface of the housing and has a plurality of openings.
  • An electret diaphragm is stacked on the conductive plate and includes a film body and an electrode layer formed on the upper surface of the film body.
  • the film body is made of dielectric material and has static charges.
  • at least one spacer is disposed between the electret diaphragm and conductive plate to keep a predetermined distance therebetween.
  • a sound absorbing layer is attached to the electrode layer.
  • the electronic device with an electro-acoustic transducer is substantially the same as the electronic device of the third embodiment.
  • the difference between them is in that the electro-acoustic transducer of the electronic device in this embodiment includes a conductive layer coated on the inner surface of the housing to replace the conductive plate of the third embodiment.
  • the electronic device 100 with an electro-acoustic transducer includes a housing 110 having a plurality of openings 114 penetrating between the inner surface 112 and the outer surface 118 thereof.
  • An electro-acoustic transducer 180 is disposed on the inner surface 112 of the housing 110.
  • the electro-acoustic transducer 180 includes an electret diaphragm 120 positioned on the inner surface 112 of the housing 110.
  • the electret diaphragm 120 includes a film body 122 and an electrode layer 124 formed on the lower surface of the film body 122.
  • the film body 122 is made of dielectric material and has static charges.
  • the film body 122 has a thickness of 7 to 25 ⁇ m and the electrode layer 124 has a thickness of 0.05 to 1 ⁇ m.
  • a conductive plate 140 functioning as an electrode is stacked on the upper surface of the film body 122 and has a plurality of openings 142 corresponding to the openings 114.
  • the conductive plate 140 has a thickness of 0.1 to 1 mm, and an aperture ratio of the openings 142 on the conductive plate 140 is greater than 20%.
  • at least one spacer 150 is disposed between the electret diaphragm 120 and the conductive plate 140 to keep a predetermined distance between the electret diaphragm 120 and the conductive plate 140.
  • the spacer 150 is spaced 5 to 20 mm apart from each other and has a height of 100 to 400 ⁇ m.
  • the film body 122 originally without static charges carried thereon is required to be subjected to a polarizing process.
  • a corona charging process can be used to polarize the film body 122 to generate static charges therein and thereon after the electrode layer 124 is formed on the film body 122.
  • the material suitable for the film body 122 can be fluorinated ethylene propylene (FEP), Polytetrafluoroethene (PTFE), Polyvinylidene Fluoride (PVDF), silicon dioxide (SiO2) or other fluoride polymers.
  • FEP fluorinated ethylene propylene
  • PTFE Polytetrafluoroethene
  • PVDF Polyvinylidene Fluoride
  • SiO2 silicon dioxide
  • the edge of the electret diaphragm 120 is required to be fixed to prevent the electret diaphragm 120 from movement.
  • electro-acoustic transducer 180 of the present embodiment work, electrical signals having the same phase and opposite phase with the original sound signal, i.e. differential signals have to be applied to the conductive plate 140 and electrode layer 124, respectively so that the electret diaphragm 120 is subject to the Coulomb forces from the conductive plate 140 and electrode layer 124 to bring about a push-pull effect.
  • the push-pull effect will cause the electret diaphragm 120 to vibrate in accordance with the electrical signals.
  • the vibration of the electret diaphragm 120 pushes the air to make sounds.
  • the sounds can travel through the openings 114 to the outside of the housing 110 thereby a user can hear the sounds.
  • the upper surface of the conductive plate 140 is spaced a predetermined distance, said more that 1 mm apart from the elements above the conductive plate 140 to prevent the echo from degrading the performance of the electro-acoustic transducer 180.
  • a sound absorbing layer 160 made of, such as glass fiber, sponge or non-woven can be attached to the upper surface of the conductive plate 140 to absorb the sounds traveling through the openings 142.
  • the sound absorbing layer 160 has a thickness of 1 to 5 mm.
  • At least one spacer 170 with a thickness of 30 to 50 ⁇ m and corresponding to the spacer 150 is positioned between the electrode layer 124 and the inner surface 112 of the housing 110 to keep the electrode layer 124 from contact with the housing 110.
  • the spacer 150 can be made of adhesive material, such as double-sided tape to attach the conductive plate 140 and film body 122 together.
  • the electronic device 200 with an electro-acoustic transducer has all the elements of the electronic device 100, that is, the housing 110 and the electret diaphragm 120, conductive plate 140, spacers 150, 170 and sound absorbing layer 160 of the electro-acoustic transducer 180.
  • the electro-acoustic transducer 280 of the electronic device 200 further includes a conductive plate 240 functioning as an electrode that is stacked on the conductive plate 140 and has a plurality of openings 242 corresponding to the openings 142 of the conductive plate 140.
  • the conductive plate 240 has a thickness of 0.1 to 1 mm.
  • An isolation layer 290 made of porous air-permeable membrane has a thickness of 20 to 200 ⁇ m and is disposed between the conductive plates 140 and 240.
  • an electret diaphragm 220 is positioned on the conductive plate 240 and includes a film body 222 and an electrode layer 224 formed on the upper surface of the film body 222, wherein the sound absorbing layer 160 is attached to the electrode layer 224.
  • the film body 222 is made of dielectric material and has static charges.
  • the film body 222 has a thickness of 7 to 25 ⁇ m and the electrode layer 224 has a thickness of 0.05 to 1 ⁇ m.
  • At least one spacer 250 made of, such as adhesive material and corresponding to the spacer 150 is disposed between the electret diaphragm 220 and the conductive plate 240 to keep a predetermined distance between the electret diaphragm 220 and the conductive plate 240.
  • the spacer 250 has a height of 100 to 400 ⁇ m.
  • the film body 222 originally without static charges carried thereon is also required to be polarized in order to generate static charges therein and thereon.
  • the material suitable for the film body 222 can be FEP, PTFE, PVDF, silicon dioxide or other fluoride polymers.
  • the edge of the electret diaphragm 220 is also required to be fixed to prevent the electret diaphragm 220 from movement.
  • a first electrical signal having the same phase with the original sound signal have to be applied to the conductive plate 140 and the electrode layer 224 and a second electrical signal having opposite phase with the original sound signal is applied to the electrode layer 124 and the conductive plate 240.
  • the electret diaphragms 120 and 220 will be subject to the Coulomb forces from the conductive plates 140, 240 and electrode layers 124, 224 to vibrate and make sounds in accordance with the first and second electrical signals.
  • the sounds made by the electret diaphragm 220 can travel through the isolation layer 290 and openings 114 to the outside of the housing 110.
  • the electro-acoustic transducer 280 with double electret diaphragms can make double (3dB) sounds than the electro-acoustic transducer 180 with only a single electret diaphragm.
  • the electronic device 300 with an electro-acoustic transducer includes a housing 110 and an electro-acoustic transducer 380 disposed on the inner surface 112 of the housing 110.
  • the electro-acoustic transducer 380 includes a conductive plate 340 functioning as an electrode disposed on the inner surface 112 of the housing 110.
  • the conductive plate 340 has a plurality of openings 342 corresponding to the openings 114.
  • An electret diaphragm 320 is stacked on the conductive plate 340 and includes a film body 322 and an electrode layer 324 formed on the upper surface of the film body 322.
  • the film body 322 is made of dielectric material and has static charges.
  • the film body 322 has a thickness of 7 to 25 ⁇ m and the electrode layer 324 has a thickness of 0.05 to 1 ⁇ m.
  • at least one spacer 350 made of, such as adhesive material is disposed between the electret diaphragm 320 and the conductive plate 340 to keep a predetermined distance between the electret diaphragm 320 and the conductive plate 340.
  • the spacer 350 is spaced 5 to 20 mm apart from each other and has a height of 100 to 400 ⁇ m.
  • At least one spacer 370 made of, such as adhesive material and corresponding to the spacer 350 is positioned between the conductive plate 340 and the inner surface 112 of the housing 110 to keep the conductive plate 340 from contact with the housing 110.
  • the spacer 370 has a thickness of 30 to 50 ⁇ m.
  • a sound absorbing layer 360 is attached to the electrode layer 324 to prevent the echo from degrading the performance of the electro-acoustic transducer 380.
  • the film body 322 originally without static charges carried thereon is also required to be polarized in order to generate static charges therein and thereon.
  • the material suitable for the film body 322 can be FEP, PTFE, PVDF, silicon dioxide or other fluoride polymers.
  • the edge of the electret diaphragm 320 is also required to be fixed to prevent the electret diaphragm 320 from movement.
  • an electrical signal has to be applied to the conductive plate 340 and electrode layer 324 thereby the electret diaphragm 320 can vibrate to make sounds in accordance with the electrical signal.
  • the electronic device 400 with an electro-acoustic transducer according to the fourth embodiment of the present invention is substantially the same as the electronic device 300 of FIG. 4 , where identical reference numerals have been used when designating substantially identically elements that are common to the figures. Any further illustrations of the identical elements are omitted herein. The difference between them is in that the electro-acoustic transducer 480 of the electronic device 400 includes a conductive layer 440 coated on the inner surface 112 of the housing 110 to replace the conductive plate 340 and does not have the spacer 370.
  • an electrical signal has to be applied to the conductive layer 440 and electrode layer 324 thereby the electret diaphragm 320 can vibrate to make sounds in accordance with the electrical signal.
  • the electro-acoustic transducers 180, 280, 380 and 480 of the electronic devices 100, 200, 300 and 400 are disposed on the housing 110 and the housing 110 can be a front cover, side cover or back cover of the electronic devices 100, 200, 300 and 400. It will be appreciated that the electro-acoustic transducers 180, 280, 380 and 480 have to be electrically connected to other elements, such as circuit boards in the electronic devices 100, 200, 300 and 400 in order to work. Referring back to FIGS.
  • the electrical terminals 119a and 119b disposed on the inner surface 112 of the back cover 110 of the electronic device 200 are electrically connected to the conductive plate 240 and electrode layer 224 of the electro-acoustic transducer 280, respectively.
  • the electrical terminals 116a and 116b are respectively brought into electrical contact with the electrical terminals 197a and 197b on the circuit boards 195 of the electronic devices 100, 200, 300 and 400, and the electrical terminals 119a and 119b (shown in FIG.
  • the electrical signals can be applied to the conductive plates 140, 240, 340, conductive layer 440 and electrode layers 124, 224, 324 thereby the electret diaphragms 120, 220, 320 can vibrate to make sounds in accordance with the electrical signals.
  • the spacers of the electro-acoustic transducers can be discrete spacers.
  • the above discrete spacers can be replaced with the sheets formed with a plurality of openings thereon.
  • the electronic devices of the present invention can be portable electronic devices, such as mobile phones, personal digital assistants (PDAs) or laptop computers. Since the electro-acoustic transducers of the electronic devices according to the present invention have a greatly smaller thickness than the traditional dynamic loudspeakers, the available space inside the electronic device can be increased. In addition, the electro-acoustic transducers of the electronic devices according to the present invention can be mounted on the back covers. Therefore, the thickness of the electronic devices can be further reduced and the available space inside the electronic device can also be further increased.
  • the electret surfaces of the electret diaphragms of the electro-acoustic transducers according to the first and second embodiments of the present invention face the insides of the electronic devices, the electret surfaces therefore get rid of the contamination of the dust and moisture to avoid the malfunction of the electret diaphragms.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Telephone Set Structure (AREA)
EP09169282.2A 2008-10-31 2009-09-02 Elektronische Vorrichtung mit elektroakustischem Elektretwandler Not-in-force EP2182737B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11162045.6A EP2369855B1 (de) 2008-10-31 2009-09-02 Elektronische Vorrichtung mit elektroakustischem Elektretwandler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW097141921A TWI454156B (zh) 2008-10-31 2008-10-31 具有駐電式電聲致動器之電子裝置

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP11162045.6A Division EP2369855B1 (de) 2008-10-31 2009-09-02 Elektronische Vorrichtung mit elektroakustischem Elektretwandler
EP11162045.6A Division-Into EP2369855B1 (de) 2008-10-31 2009-09-02 Elektronische Vorrichtung mit elektroakustischem Elektretwandler

Publications (2)

Publication Number Publication Date
EP2182737A1 true EP2182737A1 (de) 2010-05-05
EP2182737B1 EP2182737B1 (de) 2014-03-05

Family

ID=41137441

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09169282.2A Not-in-force EP2182737B1 (de) 2008-10-31 2009-09-02 Elektronische Vorrichtung mit elektroakustischem Elektretwandler
EP11162045.6A Not-in-force EP2369855B1 (de) 2008-10-31 2009-09-02 Elektronische Vorrichtung mit elektroakustischem Elektretwandler

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP11162045.6A Not-in-force EP2369855B1 (de) 2008-10-31 2009-09-02 Elektronische Vorrichtung mit elektroakustischem Elektretwandler

Country Status (3)

Country Link
EP (2) EP2182737B1 (de)
JP (1) JP5054749B2 (de)
TW (1) TWI454156B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2178311B1 (de) * 2008-10-15 2012-05-23 HTC Corporation Elektroakustischer Wandler
US8379890B2 (en) 2010-06-17 2013-02-19 Htc Corporation Capacitive electro-acoustic transduction system and capacitive electro-acoustic transducer thereof
US8472650B2 (en) 2008-10-15 2013-06-25 Htc Corporation Electro-acoustic transducer
WO2014188297A1 (de) * 2013-05-21 2014-11-27 Siemens Medical Instruments Pte. Ltd. Mikrofonanordnung
WO2018213781A1 (en) * 2017-05-18 2018-11-22 The Johns Hopkins University Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3084229A (en) 1960-03-11 1963-04-02 Ampex Electrostatic earphone
US3935397A (en) 1974-01-28 1976-01-27 Electronic Industries, Inc. Electrostatic loudspeaker element
US4160882A (en) 1978-03-13 1979-07-10 Driver Michael L Double diaphragm electrostatic transducer each diaphragm comprising two plastic sheets having different charge carrying characteristics
WO2004062318A1 (de) 2003-01-03 2004-07-22 W. L. Gore & Associates Gmbh Membran für akustische wandler
JP2008005439A (ja) 2006-06-26 2008-01-10 Yamaha Corp 平衡出力マイクロホンおよび平衡出力マイクロホンの製造方法
US20090060234A1 (en) * 2007-09-04 2009-03-05 Industrial Technology Research Institute Speaker structure
US20090060233A1 (en) * 2007-09-04 2009-03-05 Industrial Technology Research Institute Electrostatic electroacoustic transducers

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5127318A (ja) * 1974-08-31 1976-03-06 Tokyo Shibaura Electric Co Seidengatadenkionkyohenkanki
JPS536673U (de) * 1976-07-03 1978-01-20
US6243474B1 (en) * 1996-04-18 2001-06-05 California Institute Of Technology Thin film electret microphone
JP3322144B2 (ja) * 1996-12-20 2002-09-09 三菱電機株式会社 静電型透明スピーカ
WO2000027166A2 (en) * 1998-11-02 2000-05-11 Sarnoff Corporation Transducer concepts for hearing aids and other devices
WO2000070630A2 (en) * 1999-05-19 2000-11-23 California Institute Of Technology High performance mems thin-film teflon® electret microphone
JP2002345084A (ja) * 2001-05-16 2002-11-29 Citizen Electronics Co Ltd スピーカ
JP2003102097A (ja) * 2001-09-25 2003-04-04 Nippon Hoso Kyokai <Nhk> 音処理装置
JP2004166262A (ja) * 2002-10-23 2004-06-10 Matsushita Electric Ind Co Ltd 電気音響変換器及びその製造方法
US7089635B2 (en) * 2003-02-25 2006-08-15 Palo Alto Research Center, Incorporated Methods to make piezoelectric ceramic thick film arrays and elements
US7505602B2 (en) * 2003-02-28 2009-03-17 Sony Ericsson Mobile Communications Ab Mobile device with improved acoustic porting
US7382048B2 (en) * 2003-02-28 2008-06-03 Knowles Electronics, Llc Acoustic transducer module
JP3979334B2 (ja) * 2003-04-21 2007-09-19 株式会社村田製作所 圧電型電気音響変換器
CN1926919B (zh) * 2004-03-09 2011-01-26 松下电器产业株式会社 驻极体电容式麦克风
US7352873B2 (en) * 2004-04-27 2008-04-01 Hosiden Corporation Electret-condenser microphone
US7329933B2 (en) * 2004-10-29 2008-02-12 Silicon Matrix Pte. Ltd. Silicon microphone with softly constrained diaphragm
JP4822517B2 (ja) * 2005-05-24 2011-11-24 パナソニック株式会社 スピーカ装置
KR20080034407A (ko) * 2006-10-16 2008-04-21 야마하 가부시키가이샤 정전 압력 변환기 및 그 제조 방법

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3084229A (en) 1960-03-11 1963-04-02 Ampex Electrostatic earphone
US3935397A (en) 1974-01-28 1976-01-27 Electronic Industries, Inc. Electrostatic loudspeaker element
US4160882A (en) 1978-03-13 1979-07-10 Driver Michael L Double diaphragm electrostatic transducer each diaphragm comprising two plastic sheets having different charge carrying characteristics
WO2004062318A1 (de) 2003-01-03 2004-07-22 W. L. Gore & Associates Gmbh Membran für akustische wandler
JP2008005439A (ja) 2006-06-26 2008-01-10 Yamaha Corp 平衡出力マイクロホンおよび平衡出力マイクロホンの製造方法
US20090060234A1 (en) * 2007-09-04 2009-03-05 Industrial Technology Research Institute Speaker structure
US20090060233A1 (en) * 2007-09-04 2009-03-05 Industrial Technology Research Institute Electrostatic electroacoustic transducers

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2178311B1 (de) * 2008-10-15 2012-05-23 HTC Corporation Elektroakustischer Wandler
US8243965B2 (en) 2008-10-15 2012-08-14 Htc Corporation Electro-acoustic transducer
US8472650B2 (en) 2008-10-15 2013-06-25 Htc Corporation Electro-acoustic transducer
US8379890B2 (en) 2010-06-17 2013-02-19 Htc Corporation Capacitive electro-acoustic transduction system and capacitive electro-acoustic transducer thereof
DE102011050924B4 (de) * 2010-06-17 2013-11-07 Htc Corporation Kapazitives elektro-akustisches Wandler-System und kapazitiver elektro-akustischer Wandler davon
WO2014188297A1 (de) * 2013-05-21 2014-11-27 Siemens Medical Instruments Pte. Ltd. Mikrofonanordnung
WO2018213781A1 (en) * 2017-05-18 2018-11-22 The Johns Hopkins University Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting
US11228844B2 (en) 2017-05-18 2022-01-18 The Johns Hopkins University Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting

Also Published As

Publication number Publication date
EP2369855A3 (de) 2012-04-04
EP2369855B1 (de) 2014-05-07
JP5054749B2 (ja) 2012-10-24
JP2010109979A (ja) 2010-05-13
EP2182737B1 (de) 2014-03-05
TWI454156B (zh) 2014-09-21
EP2369855A2 (de) 2011-09-28
TW201018252A (en) 2010-05-01

Similar Documents

Publication Publication Date Title
US8411882B2 (en) Electronic device with electret electro-acoustic transducer
US8848962B2 (en) Unidirective condenser microphone unit and condenser microphone
JP5099605B2 (ja) 電子装置及び電気音響変換器
US7835532B2 (en) Microphone array
JPWO2006062120A1 (ja) マイクロホン装置
US10531203B2 (en) Acoustic apparatus and associated methods
CN107852550B (zh) 扬声器装置
US20080310670A1 (en) Electroacoustic transducer and magnetic circuit unit
EP2182737A1 (de) Elektronische Vorrichtung mit elektroakustischem Elektretwandler
CN107852549B (zh) 电声换能器
CN1757261A (zh) 驻极体电容式传声器
WO2017082560A1 (ko) 음향 출력 장치
JP2008047953A (ja) マイクロホンの筐体及びマイクロホン
US8369545B2 (en) Flexible luminescent electro-acoustic transducer and electronic device using the same
JP5152906B2 (ja) 無指向性コンデンサーマイクロホンユニットおよび無指向性コンデンサーマイクロホン
CN114885264B (zh) 一种麦克风组件及电子设备
CN101742388B (zh) 具有驻极体式电声换能器的电子装置
JP3967676B2 (ja) コンデンサマイクロホンユニット
JP2006014267A (ja) 指向特性が向上した指向性コンデンサマイクロホン
CN117835131A (zh) 多层静电扬声器
CN101778326B (zh) 柔性冷光电声致动器及使用该电声致动器的电子装置
CN102271303A (zh) 可挠式扬声器结构
KR20140115012A (ko) 유동 유전체를 이용한 정전형 음향 트랜스듀서
KR20070105785A (ko) 콘덴서 마이크로폰
KR20070105786A (ko) 콘덴서 마이크로폰

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20090911

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HSIEH, CHIH CHAO

Inventor name: CHENG, YI TSUNG

Inventor name: LEE, FANG CHING

17Q First examination report despatched

Effective date: 20101004

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20131001

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 655551

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140315

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602009022141

Country of ref document: DE

Effective date: 20140417

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 655551

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140305

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20140305

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140605

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140605

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140705

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602009022141

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140707

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

26N No opposition filed

Effective date: 20141208

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCOW

Free format text: NEW ADDRESS: NO. 23, XINGHUA ROAD TAOYUAN DISTRICT, TAOYUAN CITY 330 (TW)

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602009022141

Country of ref document: DE

Effective date: 20141208

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140902

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140902

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140606

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20090902

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140305

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20180712

Year of fee payment: 10

Ref country code: DE

Payment date: 20180821

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20180829

Year of fee payment: 10

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602009022141

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190902

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190902

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930